Lenny’s AI Builders

Meta and Google both say their new models caught Opus 5.5. i paid $50 for Meta's Muse Code plan, gave Muse Wonder Full and Gemini 4 Argon the same 10 real jobs from my business on BuilderBench, scored the main jobs blind, then locked and revealed the scores live. result (BuilderBench v3, 14 Oct 2026, owner-finalized partial personal review): Gemini 4 Argon 45.38/100, Muse Wonder Full 39.91/100. neither beat Opus 5.5's 68.26 - but that score is from pack 1, an older version of the test, so it's a reference line, not a same-test match. was it fair? same 10 jobs and the same 4-hour window (a storage problem interrupted it and the clock was not reset). not the same effort (Argon's highest setting is high), not the same tools (Muse Code app vs the BuilderBench API harness), and autonomy + proactivity were rated by name. Argon's cost is an API-equivalent estimate (about $8.92, partial coverage); Muse Wonder Full's usage wasn't recorded (it ran on the $50/month plan). neither is a bill. also: REA takes apart any app, Grok Bot sold a $500 ad (Alex Finn's number), Claude broke git at Anthropic, DigUp searches your Mac by meaning, and a recording device planted in OpenAI's office (charged, not convicted). chapters 0:00 Meta and Google say they caught Opus 0:15 Gemini 4 Argon + Muse Wonder Full 1:46 this is the LAB 2:01 let's find out 2:09 REA takes apart any app 3:08 Grok Bot sold a $500 ad + LennyClaw 5:10 Tibo's day 9: Codex on disk 5:29 sponsor: Threadify 6:09 Claude broke git at Anthropic 7:04 DigUp searches your Mac by meaning 7:50 a bug planted in OpenAI's office 9:17 BuilderBench: who caught Opus? 10:52 the lock and the reveal 11:55 every score 13:37 outro thanks to today's sponsor, my software Threadify - your lead generation agent: https://www.threadify.app/home?utm_source=youtube&utm_medium=video&utm_campaign=lab-0021&utm_content=sponsor want to sponsor a future episode? sponsors@lennysaibuilders.com Lenny's AI Builders - the LAB. all the AI news you need, plus something you can actually use, in under 15 minutes. less scrolling. more "oh shit, i could do that". watch the full episode: https://www.youtube.com/watch?v=Cb1oaurcx2g

What is Lenny’s AI Builders?

less scrolling. more “oh shit, i could use that.”

i’m Lennox. i dig through the AI updates worth your time, then test tools, models and agents on real work. what worked, what broke, and what you can try yourself.

for people making products, content and useful systems with AI. you don’t need to write code to build something worth using. grab the field notes for prompts, steps and the bits to watch out for: https://lennoxsaint.com/lab

this feed also keeps the earlier L E S S O N S episodes from my journey building with AI.